Whatever you do, don't be tempted to buy 'The Shakespeare Secret' (J.L. Carrell). I did, thinking it might have some of the quality of Brown's book.
It doesn't. Formula (the wrong one) plot (rubbish) characterisation (weak). It's a prime example of what might well happen when a would-be but rotten storyteller takes a US college course in fiction writing, probably taught by a red-top journalist.